Makes sure it do not crashes when polling.

src/lib/server/serviceDataPolling.ts

@@ -11,10 +11,16 @@ function isPromise(p: any): boolean {
 
 async function pollGeneric(upstream: ServiceData, url: string): Promise<ServiceData> {
 	upstream.status = undefined;
-	return fetch(url).then((resp: Response): ServiceData => {
-		upstream.status = resp.ok ? 'online' : 'offline';
-		return upstream;
-	});
+	return fetch(url)
+		.then((resp: Response): ServiceData => {
+			upstream.status = resp.ok ? 'online' : 'offline';
+			return upstream;
+		})
+		.catch((error) => {
+			console.warn("could not fetch status for '" + url + "': " + error);
+			upstream.status = 'offline';
+			return upstream;
+		});
 }
 
 function wrapHandler(handler: ServiceHandler): AsyncServiceHandler {
@@ -55,6 +61,9 @@ export function initializeServiceData() {
 	serviceData.length = config.services.length;
 	for (let i = 0; i < serviceData.length; i++) {
 		serviceData[i] = [];
+		for (let j = 0; j < config.services[i].items.length; j++) {
+			serviceData[i][j] = {};
+		}
 	}
 }